Invisible crosshair during point selection when hovering the cursor over the figure.

Hello everyone,
I have Matlab r2013a and I'm having problems when running some programs for my control design class.
The script I have requires that the user selects a point on the figure just drawn.
However the cursor (which should change to a crosshair) becomes invisible when I move it over the figure.
I can just see it when moving around and passing behind the legend.

My mac is running OS X 10.8.4, and JAVA version is the latest deployed: 1.6.0_51-b11-457-11M4509.

Are you using 'crosshair' or 'fullcross' ? 'fullcross' will xor against the background, but 'crosshair' is always black for the cross with a one-pixel white boundary around it. If you are moving against a black background and do not notice the thin white outline, it could appear invisible.